kobject: '7-1' (ffff888024c4a0a8): kobject_cleanup, parent 0000000000000000 kobject: '7-1' (ffff888024c4a0a8): calling ktype release kobject: '7-1': free name ================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. kworker/1:4/4230 [HC0[0]:SC1[1]:HE1:SE0] takes: ffff88807d1f8710 ((work_completion)(&(&host->detect)->work)){+.?.}-{0:0}, at: __flush_work+0xfa/0x210 kernel/workqueue.c:3090 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5625 __flush_work+0x116/0x210 kernel/workqueue.c:3090 __cancel_work_timer+0x3f4/0x560 kernel/workqueue.c:3181 mmc_free_host+0x15/0x30 drivers/mmc/core/host.c:663 vub300_probe+0x1873/0x2e20 drivers/mmc/host/vub300.c:2359 usb_probe_interface+0x5be/0xae0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x276/0xc70 drivers/base/dd.c:595 __driver_probe_device+0x1f5/0x390 drivers/base/dd.c:775 driver_probe_device+0x4f/0x420 drivers/base/dd.c:805 __device_attach_driver+0x2b0/0x500 drivers/base/dd.c:927 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429 __device_attach+0x2a7/0x480 drivers/base/dd.c:999 bus_probe_device+0xba/0x1d0 drivers/base/bus.c:489 device_add+0xbcf/0x1050 drivers/base/core.c:3427 usb_set_configuration+0x19d5/0x2030 drivers/usb/core/message.c:2223 usb_generic_driver_probe+0x89/0x150 drivers/usb/core/generic.c:238 usb_probe_device+0x126/0x250 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x276/0xc70 drivers/base/dd.c:595 __driver_probe_device+0x1f5/0x390 drivers/base/dd.c:775 driver_probe_device+0x4f/0x420 drivers/base/dd.c:805 __device_attach_driver+0x2b0/0x500 drivers/base/dd.c:927 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429 __device_attach+0x2a7/0x480 drivers/base/dd.c:999 bus_probe_device+0xba/0x1d0 drivers/base/bus.c:489 device_add+0xbcf/0x1050 drivers/base/core.c:3427 usb_new_device+0x9f6/0x15d0 drivers/usb/core/hub.c:2637 hub_port_connect drivers/usb/core/hub.c:5502 [inline] hub_port_connect_change drivers/usb/core/hub.c:5642 [inline] port_event drivers/usb/core/hub.c:5804 [inline] hub_event+0x2b8d/0x5260 drivers/usb/core/hub.c:5886 process_one_work+0x867/0xff0 kernel/workqueue.c:2310 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 irq event stamp: 1758884 hardirqs last enabled at (1758884): [] __cancel_work_timer+0x36a/0x560 kernel/workqueue.c:3174 hardirqs last disabled at (1758883): [] try_to_grab_pending+0xfb/0x820 kernel/workqueue.c:1272 softirqs last enabled at (1758762): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last enabled at (1758762): [] invoke_softirq kernel/softirq.c:450 [inline] softirqs last enabled at (1758762): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 softirqs last disabled at (1758801): [] __do_softirq kernel/softirq.c:610 [inline] softirqs last disabled at (1758801): [] invoke_softirq kernel/softirq.c:450 [inline] softirqs last disabled at (1758801): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock((work_completion)(&(&host->detect)->work)); lock((work_completion)(&(&host->detect)->work)); *** DEADLOCK *** 5 locks held by kworker/1:4/4230: #0: ffff88801bf1e138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1 #1: ffffc900031cfd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285 #2: ffff8881481e6220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:809 [inline] #2: ffff8881481e6220 (&dev->mutex){....}-{3:3}, at: hub_event+0x178/0x5260 drivers/usb/core/hub.c:5832 #3: ffffffff8c313aa0 (console_lock){+.+.}-{0:0}, at: vprintk_emit+0xa7/0x150 kernel/printk/printk.c:2273 #4: ffffc90000dd0bc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: lockdep_copy_map include/linux/lockdep.h:45 [inline] #4: ffffc90000dd0bc0 ((&vub300->inactivity_timer)){+.-.}-{0:0}, at: call_timer_fn+0xca/0x540 kernel/time/timer.c:1638 stack backtrace: CPU: 1 PID: 4230 Comm: kworker/1:4 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Workqueue: usb_hub_wq hub_event Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 valid_state+0x13b/0x1d0 kernel/locking/lockdep.c:3932 mark_lock_irq+0xa9/0x900 kernel/locking/lockdep.c:4135 mark_lock+0x208/0x320 kernel/locking/lockdep.c:4591 mark_usage kernel/locking/lockdep.c:-1 [inline] __lock_acquire+0xc63/0x7b50 kernel/locking/lockdep.c:4966 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5625 __flush_work+0x116/0x210 kernel/workqueue.c:3090 __cancel_work_timer+0x3f4/0x560 kernel/workqueue.c:3181 mmc_free_host+0x15/0x30 drivers/mmc/core/host.c:663 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648 expire_timers kernel/time/timer.c:1699 [inline] __run_timers+0x56c/0x810 kernel/time/timer.c:1970 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983 handle_softirqs+0x336/0x830 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:console_unlock+0xc90/0x10f0 kernel/printk/printk.c:2749 Code: 75 11 e8 33 e5 18 00 4d 85 e4 75 16 e8 29 e5 18 00 eb 15 e8 22 e5 18 00 e8 6d 05 61 08 4d 85 e4 74 ea e8 13 e5 18 00 fb 31 ff <89> de e8 69 e8 18 00 85 db 0f 94 c0 22 44 24 1f 3c 01 75 1f e8 f7 RSP: 0018:ffffc900031cf240 EFLAGS: 00000246 RAX: ffffffff81602f8d RBX: 0000000000000000 RCX: 0000000000100000 RDX: ffffc90010041000 RSI: 000000000000e6c6 RDI: 0000000000000000 RBP: ffffc900031cf4b0 R08: ffffffff901f10c7 R09: 1ffffffff203e218 R10: dffffc0000000000 R11: fffffbfff203e219 R12: 0000000000000200 R13: 0000000000000059 R14: 0000000000000000 R15: dffffc0000000000 vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274 dev_vprintk_emit+0x2c2/0x360 drivers/base/core.c:4665 dev_printk_emit+0xeb/0x140 drivers/base/core.c:4676 _dev_info+0x11b/0x170 drivers/base/core.c:4734 announce_device+0x117/0x2b0 drivers/usb/core/hub.c:2355 usb_new_device+0x48f/0x15d0 drivers/usb/core/hub.c:2618 hub_port_connect drivers/usb/core/hub.c:5502 [inline] hub_port_connect_change drivers/usb/core/hub.c:5642 [inline] port_event drivers/usb/core/hub.c:5804 [inline] hub_event+0x2b8d/0x5260 drivers/usb/core/hub.c:5886 process_one_work+0x867/0xff0 kernel/workqueue.c:2310 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 BUG: sleeping function called from invalid context at kernel/workqueue.c:3031 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 4230, name: kworker/1:4 INFO: lockdep is turned off. Preemption disabled at: [] vprintk_emit+0xa2/0x150 kernel/printk/printk.c:2267 CPU: 1 PID: 4230 Comm: kworker/1:4 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Workqueue: usb_hub_wq hub_event Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 ___might_sleep+0x493/0x610 kernel/sched/core.c:9658 start_flush_work+0x2e/0x830 kernel/workqueue.c:3031 __flush_work+0x148/0x210 kernel/workqueue.c:3093 __cancel_work_timer+0x3f4/0x560 kernel/workqueue.c:3181 mmc_free_host+0x15/0x30 drivers/mmc/core/host.c:663 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648 expire_timers kernel/time/timer.c:1699 [inline] __run_timers+0x56c/0x810 kernel/time/timer.c:1970 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983 handle_softirqs+0x336/0x830 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:console_unlock+0xc90/0x10f0 kernel/printk/printk.c:2749 Code: 75 11 e8 33 e5 18 00 4d 85 e4 75 16 e8 29 e5 18 00 eb 15 e8 22 e5 18 00 e8 6d 05 61 08 4d 85 e4 74 ea e8 13 e5 18 00 fb 31 ff <89> de e8 69 e8 18 00 85 db 0f 94 c0 22 44 24 1f 3c 01 75 1f e8 f7 RSP: 0018:ffffc900031cf240 EFLAGS: 00000246 RAX: ffffffff81602f8d RBX: 0000000000000000 RCX: 0000000000100000 RDX: ffffc90010041000 RSI: 000000000000e6c6 RDI: 0000000000000000 RBP: ffffc900031cf4b0 R08: ffffffff901f10c7 R09: 1ffffffff203e218 R10: dffffc0000000000 R11: fffffbfff203e219 R12: 0000000000000200 R13: 0000000000000059 R14: 0000000000000000 R15: dffffc0000000000 vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274 dev_vprintk_emit+0x2c2/0x360 drivers/base/core.c:4665 dev_printk_emit+0xeb/0x140 drivers/base/core.c:4676 _dev_info+0x11b/0x170 drivers/base/core.c:4734 announce_device+0x117/0x2b0 drivers/usb/core/hub.c:2355 usb_new_device+0x48f/0x15d0 drivers/usb/core/hub.c:2618 hub_port_connect drivers/usb/core/hub.c:5502 [inline] hub_port_connect_change drivers/usb/core/hub.c:5642 [inline] port_event drivers/usb/core/hub.c:5804 [inline] hub_event+0x2b8d/0x5260 drivers/usb/core/hub.c:5886 process_one_work+0x867/0xff0 kernel/workqueue.c:2310 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 kobject: 'mmc0' (ffff88807d1f8008): kobject_cleanup, parent 0000000000000000 kobject: 'mmc0' (ffff88807d1f8008): calling ktype release ODEBUG: object ffffc90000dd09a0 is NOT on stack ffffc900031c8000, but annotated. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4230 at lib/debugobjects.c:561 debug_object_is_on_stack lib/debugobjects.c:-1 [inline] WARNING: CPU: 1 PID: 4230 at lib/debugobjects.c:561 lookup_object_or_alloc lib/debugobjects.c:594 [inline] WARNING: CPU: 1 PID: 4230 at lib/debugobjects.c:561 __debug_object_init+0x4c0/0xc80 lib/debugobjects.c:621 Modules linked in: CPU: 1 PID: 4230 Comm: kworker/1:4 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:561 [inline] RIP: 0010:lookup_object_or_alloc lib/debugobjects.c:594 [inline] RIP: 0010:__debug_object_init+0x4c0/0xc80 lib/debugobjects.c:621 Code: 76 dd 72 12 48 c7 c1 c0 50 7a 8a 48 c7 c7 20 51 7a 8a 84 c0 48 0f 45 f9 4c 89 ee e8 aa 57 c9 05 48 be 00 00 00 00 00 fc ff df <0f> 0b e9 4d fd ff ff 83 3d a2 dc 72 12 00 4c 89 6c 24 28 0f 84 23 RSP: 0018:ffffc90000dd07e0 EFLAGS: 00010046 RAX: 0000000000000050 RBX: 0000000000000001 RCX: 58ccbbdab4b6e400 RDX: 0000000000000100 RSI: dffffc0000000000 RDI: 0000000000000000 RBP: ffffc90000dd0950 R08: ffffffff8c313963 R09: 1ffffffff186272c R10: dffffc0000000000 R11: fffffbfff186272d R12: f8f8f8f8f8f8f8f8 R13: ffffc90000dd09a0 R14: ffff88807be7d960 R15: ffff888023cdcb98 FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdbb57f7840 CR3: 0000000055c6e000 CR4: 00000000003506e0 Call Trace: __synchronize_srcu+0x229/0x350 kernel/rcu/srcutree.c:928 wakeup_source_remove drivers/base/power/wakeup.c:203 [inline] wakeup_source_unregister+0x112/0x190 drivers/base/power/wakeup.c:247 mmc_host_classdev_release+0x43/0xf0 drivers/mmc/core/host.c:77 device_release+0x92/0x1c0 drivers/base/core.c:-1 kobject_cleanup lib/kobject.c:713 [inline] kobject_release lib/kobject.c:744 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x217/0x450 lib/kobject.c:761 call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648 expire_timers kernel/time/timer.c:1699 [inline] __run_timers+0x56c/0x810 kernel/time/timer.c:1970 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983 handle_softirqs+0x336/0x830 kernel/softirq.c:576 __do_softirq kernel/softirq.c:610 [inline] invoke_softirq kernel/softirq.c:450 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:console_unlock+0xc90/0x10f0 kernel/printk/printk.c:2749 Code: 75 11 e8 33 e5 18 00 4d 85 e4 75 16 e8 29 e5 18 00 eb 15 e8 22 e5 18 00 e8 6d 05 61 08 4d 85 e4 74 ea e8 13 e5 18 00 fb 31 ff <89> de e8 69 e8 18 00 85 db 0f 94 c0 22 44 24 1f 3c 01 75 1f e8 f7 RSP: 0018:ffffc900031cf240 EFLAGS: 00000246 RAX: ffffffff81602f8d RBX: 0000000000000000 RCX: 0000000000100000 RDX: ffffc90010041000 RSI: 000000000000e6c6 RDI: 0000000000000000 RBP: ffffc900031cf4b0 R08: ffffffff901f10c7 R09: 1ffffffff203e218 R10: dffffc0000000000 R11: fffffbfff203e219 R12: 0000000000000200 R13: 0000000000000059 R14: 0000000000000000 R15: dffffc0000000000 vprintk_emit+0xc0/0x150 kernel/printk/printk.c:2274 dev_vprintk_emit+0x2c2/0x360 drivers/base/core.c:4665 dev_printk_emit+0xeb/0x140 drivers/base/core.c:4676 _dev_info+0x11b/0x170 drivers/base/core.c:4734 announce_device+0x117/0x2b0 drivers/usb/core/hub.c:2355 usb_new_device+0x48f/0x15d0 drivers/usb/core/hub.c:2618 hub_port_connect drivers/usb/core/hub.c:5502 [inline] hub_port_connect_change drivers/usb/core/hub.c:5642 [inline] port_event drivers/usb/core/hub.c:5804 [inline] hub_event+0x2b8d/0x5260 drivers/usb/core/hub.c:5886 process_one_work+0x867/0xff0 kernel/workqueue.c:2310 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 ---------------- Code disassembly (best guess): 0: 75 11 jne 0x13 2: e8 33 e5 18 00 call 0x18e53a 7: 4d 85 e4 test %r12,%r12 a: 75 16 jne 0x22 c: e8 29 e5 18 00 call 0x18e53a 11: eb 15 jmp 0x28 13: e8 22 e5 18 00 call 0x18e53a 18: e8 6d 05 61 08 call 0x861058a 1d: 4d 85 e4 test %r12,%r12 20: 74 ea je 0xc 22: e8 13 e5 18 00 call 0x18e53a 27: fb sti 28: 31 ff xor %edi,%edi * 2a: 89 de mov %ebx,%esi <-- trapping instruction 2c: e8 69 e8 18 00 call 0x18e89a 31: 85 db test %ebx,%ebx 33: 0f 94 c0 sete %al 36: 22 44 24 1f and 0x1f(%rsp),%al 3a: 3c 01 cmp $0x1,%al 3c: 75 1f jne 0x5d 3e: e8 .byte 0xe8 3f: f7 .byte 0xf7